Free Tools
GSTIN Format Validator
Paste a GSTIN to check whether it follows the correct 15-character structure.
This checks structural format only (state code, PAN, entity code, checksum position). It doesn't confirm the GSTIN is active or real. Cross-check on the official GST portal for that.
Official sources
The rules, rates and deadlines described here are set by the government and do change. This is where they are officially published:
- Search a taxpayer by GSTIN, Goods and Services Tax Network (GSTN)
Need help beyond a calculation? Talk to a GST expert.